/*
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2015 Alejandro P. Revilla
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.jpos.emv;


import org.jpos.tlv.TLVDataFormat;

import java.io.Serializable;


/**
 * @author Vishnu Pillai
 */
public class EMVConstructedTag<T> implements Serializable {

	private final EMVTagType tagType;
	private final TLVDataFormat dataFormat;
	private final Integer tagNumber;
	private final T value;


	public EMVConstructedTag(final EMVStandardTagType tagType, final T value) throws IllegalArgumentException {
		if (tagType == null) {
			throw new IllegalArgumentException("tagType cannot be null");
		}
		if (value == null) {
			throw new IllegalArgumentException("value cannot be null");
		}
		if (tagType.isProprietaryTag()) {
			throw new IllegalArgumentException("Tag Number must be specified for proprietary tag");
		}
		if (tagType.isProprietaryFormat()) {
			throw new IllegalArgumentException(
					"Tag TLVDataFormat must be specified for tag with proprietary format");
		} else {
			try {
				if (!tagType.getDataType().isAssignableFrom(value.getClass())) {
					throw new IllegalArgumentException("Tag: " + tagType.getTagNumberHex() +
							". Value should be of type: " + tagType.getDataType() + ". Received " +
							value.getClass());
				}
			} catch (ProprietaryFormatException e) {
				throw new IllegalStateException(e);
			}
		}
		this.tagType = tagType;
		this.value = value;
		this.tagNumber = tagType.getTagNumber();
		this.dataFormat = tagType.getFormat();
	}


	public EMVConstructedTag(final EMVProprietaryTagType tagType, Integer tagNumber, final T value)
			throws IllegalArgumentException {
		if (tagType == null) {
			throw new IllegalArgumentException("tagType cannot be null");
		}
		if (value == null) {
			throw new IllegalArgumentException("value cannot be null");
		}
		if (!EMVStandardTagType.isProprietaryTag(tagNumber)) {
			throw new IllegalArgumentException(
					"Proprietary tag number conflicts with standard tag list");
		}
		if (tagType.isProprietaryFormat()) {
			throw new IllegalArgumentException(
					"Tag TLVDataFormat must be specified for proprietary tag");
		} else {
			try {
				if (!getDataType(tagType.getFormat()).isAssignableFrom(value.getClass())) {
					throw new IllegalArgumentException("Tag: " + tagType.getTagNumberHex() +
							". Value should be of type: " + tagType.getDataType() + ". Received " +
							value.getClass());
				}
			} catch (ProprietaryFormatException e) {
				throw new IllegalStateException(e);
			}
		}
		this.tagType = tagType;
		this.value = value;
		this.tagNumber = tagNumber;
		this.dataFormat = tagType.getFormat();
	}


	public EMVConstructedTag(final EMVProprietaryTagType tagType, Integer tagNumber, TLVDataFormat dataFormat,
	                         final T value) throws IllegalArgumentException {
		if (tagType == null) {
			throw new IllegalArgumentException("tagType cannot be null");
		}
		if (value == null) {
			throw new IllegalArgumentException("value cannot be null");
		}
		if (!EMVStandardTagType.isProprietaryTag(tagNumber)) {
			throw new IllegalArgumentException(
					"Proprietary tag number conflicts with standard tag list");
		}
		if (!getDataType(dataFormat).isAssignableFrom(value.getClass())) {
			throw new IllegalArgumentException("Tag: " + tagNumber + " : " +
					tagType.getTagShortDescription() + ". Value should be of type: " +
					getDataType(dataFormat) + ". Received " + value.getClass());
		}
		this.tagType = tagType;
		this.value = value;
		this.tagNumber = tagNumber;
		this.dataFormat = dataFormat;
	}

	private static Class<?> getDataType(TLVDataFormat dataFormat)
			throws IllegalArgumentException {
		switch (dataFormat) {
			case BINARY:
				return byte[].class;
			default:
				return String.class;
		}
	}

	public TLVDataFormat getDataFormat() {
		return dataFormat;
	}

	public Integer getTagNumber() {
		return tagNumber;
	}

	public EMVTagType getTagType() {
		return tagType;
	}

	public T getValue() {
		return value;
	}

	public String getTagNumberHex() {
		return Integer.toHexString(tagNumber).toUpperCase();
	}
}
